Lines Matching full:i2c
4 * I2C adapter for the PXA I2C bus access.
24 #include <linux/i2c.h>
31 #include <linux/i2c-pxa.h>
38 #include <linux/i2c/pxa-i2c.h>
64 * I2C registers definitions
91 { "pxa2xx-i2c", REGS_PXA2XX },
93 { "ce4100-i2c", REGS_CE4100 },
99 * I2C bit definitions
165 #define _IBMR(i2c) ((i2c)->reg_ibmr) argument
166 #define _IDBR(i2c) ((i2c)->reg_idbr) argument
167 #define _ICR(i2c) ((i2c)->reg_icr) argument
168 #define _ISR(i2c) ((i2c)->reg_isr) argument
169 #define _ISAR(i2c) ((i2c)->reg_isar) argument
172 * I2C Slave mode address
245 static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname) in i2c_pxa_show_state() argument
247 dev_dbg(&i2c->adap.dev, "state:%s:%d: ISR=%08x, ICR=%08x, IBMR=%02x\n", fname, lno, in i2c_pxa_show_state()
248 readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_show_state()
251 #define show_state(i2c) i2c_pxa_show_state(i2c, __LINE__, __func__) argument
253 static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why) in i2c_pxa_scream_blue_murder() argument
256 printk(KERN_ERR "i2c: error: %s\n", why); in i2c_pxa_scream_blue_murder()
257 printk(KERN_ERR "i2c: msg_num: %d msg_idx: %d msg_ptr: %d\n", in i2c_pxa_scream_blue_murder()
258 i2c->msg_num, i2c->msg_idx, i2c->msg_ptr); in i2c_pxa_scream_blue_murder()
259 printk(KERN_ERR "i2c: ICR: %08x ISR: %08x\n", in i2c_pxa_scream_blue_murder()
260 readl(_ICR(i2c)), readl(_ISR(i2c))); in i2c_pxa_scream_blue_murder()
261 printk(KERN_DEBUG "i2c: log: "); in i2c_pxa_scream_blue_murder()
262 for (i = 0; i < i2c->irqlogidx; i++) in i2c_pxa_scream_blue_murder()
263 printk("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]); in i2c_pxa_scream_blue_murder()
271 #define show_state(i2c) do { } while (0) argument
274 #define i2c_pxa_scream_blue_murder(i2c, why) do { } while (0) argument
278 static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret);
281 static inline int i2c_pxa_is_slavemode(struct pxa_i2c *i2c) in i2c_pxa_is_slavemode() argument
283 return !(readl(_ICR(i2c)) & ICR_SCLE); in i2c_pxa_is_slavemode()
286 static void i2c_pxa_abort(struct pxa_i2c *i2c) in i2c_pxa_abort() argument
290 if (i2c_pxa_is_slavemode(i2c)) { in i2c_pxa_abort()
291 dev_dbg(&i2c->adap.dev, "%s: called in slave mode\n", __func__); in i2c_pxa_abort()
295 while ((i > 0) && (readl(_IBMR(i2c)) & 0x1) == 0) { in i2c_pxa_abort()
296 unsigned long icr = readl(_ICR(i2c)); in i2c_pxa_abort()
301 writel(icr, _ICR(i2c)); in i2c_pxa_abort()
303 show_state(i2c); in i2c_pxa_abort()
309 writel(readl(_ICR(i2c)) & ~(ICR_MA | ICR_START | ICR_STOP), in i2c_pxa_abort()
310 _ICR(i2c)); in i2c_pxa_abort()
313 static int i2c_pxa_wait_bus_not_busy(struct pxa_i2c *i2c) in i2c_pxa_wait_bus_not_busy() argument
317 while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { in i2c_pxa_wait_bus_not_busy()
318 if ((readl(_ISR(i2c)) & ISR_SAD) != 0) in i2c_pxa_wait_bus_not_busy()
322 show_state(i2c); in i2c_pxa_wait_bus_not_busy()
326 show_state(i2c); in i2c_pxa_wait_bus_not_busy()
331 static int i2c_pxa_wait_master(struct pxa_i2c *i2c) in i2c_pxa_wait_master() argument
337 dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_wait_master()
338 __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_wait_master()
340 if (readl(_ISR(i2c)) & ISR_SAD) { in i2c_pxa_wait_master()
342 dev_dbg(&i2c->adap.dev, "%s: Slave detected\n", __func__); in i2c_pxa_wait_master()
347 * quick check of the i2c lines themselves to ensure they've in i2c_pxa_wait_master()
350 if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) == 0 && readl(_IBMR(i2c)) == 3) { in i2c_pxa_wait_master()
352 dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); in i2c_pxa_wait_master()
360 dev_dbg(&i2c->adap.dev, "%s: did not free\n", __func__); in i2c_pxa_wait_master()
365 static int i2c_pxa_set_master(struct pxa_i2c *i2c) in i2c_pxa_set_master() argument
368 dev_dbg(&i2c->adap.dev, "setting to bus master\n"); in i2c_pxa_set_master()
370 if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) != 0) { in i2c_pxa_set_master()
371 dev_dbg(&i2c->adap.dev, "%s: unit is busy\n", __func__); in i2c_pxa_set_master()
372 if (!i2c_pxa_wait_master(i2c)) { in i2c_pxa_set_master()
373 dev_dbg(&i2c->adap.dev, "%s: error: unit busy\n", __func__); in i2c_pxa_set_master()
378 writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); in i2c_pxa_set_master()
383 static int i2c_pxa_wait_slave(struct pxa_i2c *i2c) in i2c_pxa_wait_slave() argument
389 show_state(i2c); in i2c_pxa_wait_slave()
393 dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_wait_slave()
394 __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_wait_slave()
396 if ((readl(_ISR(i2c)) & (ISR_UB|ISR_IBB)) == 0 || in i2c_pxa_wait_slave()
397 (readl(_ISR(i2c)) & ISR_SAD) != 0 || in i2c_pxa_wait_slave()
398 (readl(_ICR(i2c)) & ICR_SCLE) == 0) { in i2c_pxa_wait_slave()
400 dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); in i2c_pxa_wait_slave()
408 dev_dbg(&i2c->adap.dev, "%s: did not free\n", __func__); in i2c_pxa_wait_slave()
416 static void i2c_pxa_set_slave(struct pxa_i2c *i2c, int errcode) in i2c_pxa_set_slave() argument
418 show_state(i2c); in i2c_pxa_set_slave()
426 if (readl(_ICR(i2c)) & ICR_STOP) { in i2c_pxa_set_slave()
428 writel(readl(_ICR(i2c)) & ~ICR_STOP, _ICR(i2c)); in i2c_pxa_set_slave()
431 if (!i2c_pxa_wait_slave(i2c)) { in i2c_pxa_set_slave()
432 dev_err(&i2c->adap.dev, "%s: wait timedout\n", in i2c_pxa_set_slave()
438 writel(readl(_ICR(i2c)) & ~(ICR_STOP|ICR_ACKNAK|ICR_MA), _ICR(i2c)); in i2c_pxa_set_slave()
439 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_set_slave()
442 dev_dbg(&i2c->adap.dev, "ICR now %08x, ISR %08x\n", readl(_ICR(i2c)), readl(_ISR(i2c))); in i2c_pxa_set_slave()
443 decode_ICR(readl(_ICR(i2c))); in i2c_pxa_set_slave()
447 #define i2c_pxa_set_slave(i2c, err) do { } while (0) argument
450 static void i2c_pxa_reset(struct pxa_i2c *i2c) in i2c_pxa_reset() argument
452 pr_debug("Resetting I2C Controller Unit\n"); in i2c_pxa_reset()
455 i2c_pxa_abort(i2c); in i2c_pxa_reset()
458 writel(ICR_UR, _ICR(i2c)); in i2c_pxa_reset()
459 writel(I2C_ISR_INIT, _ISR(i2c)); in i2c_pxa_reset()
460 writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c)); in i2c_pxa_reset()
462 if (i2c->reg_isar) in i2c_pxa_reset()
463 writel(i2c->slave_addr, _ISAR(i2c)); in i2c_pxa_reset()
466 writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c)); in i2c_pxa_reset()
469 dev_info(&i2c->adap.dev, "Enabling slave mode\n"); in i2c_pxa_reset()
470 writel(readl(_ICR(i2c)) | ICR_SADIE | ICR_ALDIE | ICR_SSDIE, _ICR(i2c)); in i2c_pxa_reset()
473 i2c_pxa_set_slave(i2c, 0); in i2c_pxa_reset()
476 writel(readl(_ICR(i2c)) | ICR_IUE, _ICR(i2c)); in i2c_pxa_reset()
483 * PXA I2C Slave mode
486 static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_txempty() argument
493 if (i2c->slave != NULL) in i2c_pxa_slave_txempty()
494 ret = i2c->slave->read(i2c->slave->data); in i2c_pxa_slave_txempty()
496 writel(ret, _IDBR(i2c)); in i2c_pxa_slave_txempty()
497 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); /* allow next byte */ in i2c_pxa_slave_txempty()
501 static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_rxfull() argument
503 unsigned int byte = readl(_IDBR(i2c)); in i2c_pxa_slave_rxfull()
505 if (i2c->slave != NULL) in i2c_pxa_slave_rxfull()
506 i2c->slave->write(i2c->slave->data, byte); in i2c_pxa_slave_rxfull()
508 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_rxfull()
511 static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_start() argument
516 dev_dbg(&i2c->adap.dev, "SAD, mode is slave-%cx\n", in i2c_pxa_slave_start()
519 if (i2c->slave != NULL) in i2c_pxa_slave_start()
520 i2c->slave->event(i2c->slave->data, in i2c_pxa_slave_start()
528 writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); in i2c_pxa_slave_start()
529 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_start()
534 if ((readl(_IBMR(i2c)) & 2) == 2) in i2c_pxa_slave_start()
540 dev_err(&i2c->adap.dev, "timeout waiting for SCL high\n"); in i2c_pxa_slave_start()
545 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_slave_start()
548 static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) in i2c_pxa_slave_stop() argument
551 dev_dbg(&i2c->adap.dev, "ISR: SSD (Slave Stop)\n"); in i2c_pxa_slave_stop()
553 if (i2c->slave != NULL) in i2c_pxa_slave_stop()
554 i2c->slave->event(i2c->slave->data, I2C_SLAVE_EVENT_STOP); in i2c_pxa_slave_stop()
557 dev_dbg(&i2c->adap.dev, "ISR: SSD (Slave Stop) acked\n"); in i2c_pxa_slave_stop()
563 if (i2c->msg) in i2c_pxa_slave_stop()
564 i2c_pxa_master_complete(i2c, I2C_RETRY); in i2c_pxa_slave_stop()
567 static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_txempty() argument
572 writel(0, _IDBR(i2c)); in i2c_pxa_slave_txempty()
573 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_txempty()
577 static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_rxfull() argument
579 writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); in i2c_pxa_slave_rxfull()
582 static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_start() argument
591 writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); in i2c_pxa_slave_start()
592 writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); in i2c_pxa_slave_start()
597 if ((readl(_IBMR(i2c)) & 2) == 2) in i2c_pxa_slave_start()
603 dev_err(&i2c->adap.dev, "timeout waiting for SCL high\n"); in i2c_pxa_slave_start()
608 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_slave_start()
611 static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) in i2c_pxa_slave_stop() argument
613 if (i2c->msg) in i2c_pxa_slave_stop()
614 i2c_pxa_master_complete(i2c, I2C_RETRY); in i2c_pxa_slave_stop()
619 * PXA I2C Master mode
632 static inline void i2c_pxa_start_message(struct pxa_i2c *i2c) in i2c_pxa_start_message() argument
639 writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); in i2c_pxa_start_message()
644 icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE); in i2c_pxa_start_message()
645 writel(icr | ICR_START | ICR_TB, _ICR(i2c)); in i2c_pxa_start_message()
648 static inline void i2c_pxa_stop_message(struct pxa_i2c *i2c) in i2c_pxa_stop_message() argument
655 icr = readl(_ICR(i2c)); in i2c_pxa_stop_message()
657 writel(icr, _ICR(i2c)); in i2c_pxa_stop_message()
660 static int i2c_pxa_pio_set_master(struct pxa_i2c *i2c) in i2c_pxa_pio_set_master() argument
668 while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { in i2c_pxa_pio_set_master()
670 show_state(i2c); in i2c_pxa_pio_set_master()
674 show_state(i2c); in i2c_pxa_pio_set_master()
675 dev_err(&i2c->adap.dev, in i2c_pxa_pio_set_master()
683 writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); in i2c_pxa_pio_set_master()
688 static int i2c_pxa_do_pio_xfer(struct pxa_i2c *i2c, in i2c_pxa_do_pio_xfer() argument
694 ret = i2c_pxa_pio_set_master(i2c); in i2c_pxa_do_pio_xfer()
698 i2c->msg = msg; in i2c_pxa_do_pio_xfer()
699 i2c->msg_num = num; in i2c_pxa_do_pio_xfer()
700 i2c->msg_idx = 0; in i2c_pxa_do_pio_xfer()
701 i2c->msg_ptr = 0; in i2c_pxa_do_pio_xfer()
702 i2c->irqlogidx = 0; in i2c_pxa_do_pio_xfer()
704 i2c_pxa_start_message(i2c); in i2c_pxa_do_pio_xfer()
706 while (i2c->msg_num > 0 && --timeout) { in i2c_pxa_do_pio_xfer()
707 i2c_pxa_handler(0, i2c); in i2c_pxa_do_pio_xfer()
711 i2c_pxa_stop_message(i2c); in i2c_pxa_do_pio_xfer()
714 * We place the return code in i2c->msg_idx. in i2c_pxa_do_pio_xfer()
716 ret = i2c->msg_idx; in i2c_pxa_do_pio_xfer()
720 i2c_pxa_scream_blue_murder(i2c, "timeout"); in i2c_pxa_do_pio_xfer()
728 static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num) in i2c_pxa_do_xfer() argument
736 ret = i2c_pxa_wait_bus_not_busy(i2c); in i2c_pxa_do_xfer()
738 dev_err(&i2c->adap.dev, "i2c_pxa: timeout waiting for bus free\n"); in i2c_pxa_do_xfer()
745 ret = i2c_pxa_set_master(i2c); in i2c_pxa_do_xfer()
747 dev_err(&i2c->adap.dev, "i2c_pxa_set_master: error %d\n", ret); in i2c_pxa_do_xfer()
751 spin_lock_irq(&i2c->lock); in i2c_pxa_do_xfer()
753 i2c->msg = msg; in i2c_pxa_do_xfer()
754 i2c->msg_num = num; in i2c_pxa_do_xfer()
755 i2c->msg_idx = 0; in i2c_pxa_do_xfer()
756 i2c->msg_ptr = 0; in i2c_pxa_do_xfer()
757 i2c->irqlogidx = 0; in i2c_pxa_do_xfer()
759 i2c_pxa_start_message(i2c); in i2c_pxa_do_xfer()
761 spin_unlock_irq(&i2c->lock); in i2c_pxa_do_xfer()
766 timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5); in i2c_pxa_do_xfer()
767 i2c_pxa_stop_message(i2c); in i2c_pxa_do_xfer()
770 * We place the return code in i2c->msg_idx. in i2c_pxa_do_xfer()
772 ret = i2c->msg_idx; in i2c_pxa_do_xfer()
774 if (!timeout && i2c->msg_num) { in i2c_pxa_do_xfer()
775 i2c_pxa_scream_blue_murder(i2c, "timeout"); in i2c_pxa_do_xfer()
786 struct pxa_i2c *i2c = adap->algo_data; in i2c_pxa_pio_xfer() local
789 /* If the I2C controller is disabled we need to reset it in i2c_pxa_pio_xfer()
793 if (!(readl(_ICR(i2c)) & ICR_IUE)) in i2c_pxa_pio_xfer()
794 i2c_pxa_reset(i2c); in i2c_pxa_pio_xfer()
797 ret = i2c_pxa_do_pio_xfer(i2c, msgs, num); in i2c_pxa_pio_xfer()
805 i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); in i2c_pxa_pio_xfer()
808 i2c_pxa_set_slave(i2c, ret); in i2c_pxa_pio_xfer()
815 static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret) in i2c_pxa_master_complete() argument
817 i2c->msg_ptr = 0; in i2c_pxa_master_complete()
818 i2c->msg = NULL; in i2c_pxa_master_complete()
819 i2c->msg_idx ++; in i2c_pxa_master_complete()
820 i2c->msg_num = 0; in i2c_pxa_master_complete()
822 i2c->msg_idx = ret; in i2c_pxa_master_complete()
823 if (!i2c->use_pio) in i2c_pxa_master_complete()
824 wake_up(&i2c->wait); in i2c_pxa_master_complete()
827 static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_irq_txempty() argument
829 u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); in i2c_pxa_irq_txempty()
840 i2c_pxa_scream_blue_murder(i2c, "ALD set"); in i2c_pxa_irq_txempty()
845 * they should, we end up causing an I2C error, which in i2c_pxa_irq_txempty()
855 * I2C bus error - either the device NAK'd us, or in i2c_pxa_irq_txempty()
860 if (i2c->msg_ptr == 0 && i2c->msg_idx == 0) in i2c_pxa_irq_txempty()
865 i2c_pxa_master_complete(i2c, ret); in i2c_pxa_irq_txempty()
871 if (i2c->msg_ptr == i2c->msg->len - 1 && in i2c_pxa_irq_txempty()
872 i2c->msg_idx == i2c->msg_num - 1) in i2c_pxa_irq_txempty()
876 } else if (i2c->msg_ptr < i2c->msg->len) { in i2c_pxa_irq_txempty()
880 writel(i2c->msg->buf[i2c->msg_ptr++], _IDBR(i2c)); in i2c_pxa_irq_txempty()
888 if (i2c->msg_ptr == i2c->msg->len && in i2c_pxa_irq_txempty()
889 i2c->msg_idx == i2c->msg_num - 1) in i2c_pxa_irq_txempty()
891 } else if (i2c->msg_idx < i2c->msg_num - 1) { in i2c_pxa_irq_txempty()
895 i2c->msg_ptr = 0; in i2c_pxa_irq_txempty()
896 i2c->msg_idx ++; in i2c_pxa_irq_txempty()
897 i2c->msg++; in i2c_pxa_irq_txempty()
904 if (i2c->msg->flags & I2C_M_NOSTART) in i2c_pxa_irq_txempty()
910 writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); in i2c_pxa_irq_txempty()
918 if (i2c->msg->len == 0) { in i2c_pxa_irq_txempty()
924 i2c_pxa_reset(i2c); in i2c_pxa_irq_txempty()
926 i2c_pxa_master_complete(i2c, 0); in i2c_pxa_irq_txempty()
929 i2c->icrlog[i2c->irqlogidx-1] = icr; in i2c_pxa_irq_txempty()
931 writel(icr, _ICR(i2c)); in i2c_pxa_irq_txempty()
932 show_state(i2c); in i2c_pxa_irq_txempty()
935 static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_irq_rxfull() argument
937 u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); in i2c_pxa_irq_rxfull()
942 i2c->msg->buf[i2c->msg_ptr++] = readl(_IDBR(i2c)); in i2c_pxa_irq_rxfull()
944 if (i2c->msg_ptr < i2c->msg->len) { in i2c_pxa_irq_rxfull()
949 if (i2c->msg_ptr == i2c->msg->len - 1) in i2c_pxa_irq_rxfull()
954 i2c_pxa_master_complete(i2c, 0); in i2c_pxa_irq_rxfull()
957 i2c->icrlog[i2c->irqlogidx-1] = icr; in i2c_pxa_irq_rxfull()
959 writel(icr, _ICR(i2c)); in i2c_pxa_irq_rxfull()
966 struct pxa_i2c *i2c = dev_id; in i2c_pxa_handler() local
967 u32 isr = readl(_ISR(i2c)); in i2c_pxa_handler()
973 dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_handler()
974 __func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_handler()
978 if (i2c->irqlogidx < ARRAY_SIZE(i2c->isrlog)) in i2c_pxa_handler()
979 i2c->isrlog[i2c->irqlogidx++] = isr; in i2c_pxa_handler()
981 show_state(i2c); in i2c_pxa_handler()
986 writel(isr & VALID_INT_SOURCE, _ISR(i2c)); in i2c_pxa_handler()
989 i2c_pxa_slave_start(i2c, isr); in i2c_pxa_handler()
991 i2c_pxa_slave_stop(i2c); in i2c_pxa_handler()
993 if (i2c_pxa_is_slavemode(i2c)) { in i2c_pxa_handler()
995 i2c_pxa_slave_txempty(i2c, isr); in i2c_pxa_handler()
997 i2c_pxa_slave_rxfull(i2c, isr); in i2c_pxa_handler()
998 } else if (i2c->msg) { in i2c_pxa_handler()
1000 i2c_pxa_irq_txempty(i2c, isr); in i2c_pxa_handler()
1002 i2c_pxa_irq_rxfull(i2c, isr); in i2c_pxa_handler()
1004 i2c_pxa_scream_blue_murder(i2c, "spurious irq"); in i2c_pxa_handler()
1013 struct pxa_i2c *i2c = adap->algo_data; in i2c_pxa_xfer() local
1017 ret = i2c_pxa_do_xfer(i2c, msgs, num); in i2c_pxa_xfer()
1025 i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); in i2c_pxa_xfer()
1028 i2c_pxa_set_slave(i2c, ret); in i2c_pxa_xfer()
1049 struct pxa_i2c *i2c; in i2c_pxa_probe() local
1065 i2c = kzalloc(sizeof(struct pxa_i2c), GFP_KERNEL); in i2c_pxa_probe()
1066 if (!i2c) { in i2c_pxa_probe()
1071 i2c->adap.owner = THIS_MODULE; in i2c_pxa_probe()
1072 i2c->adap.retries = 5; in i2c_pxa_probe()
1074 spin_lock_init(&i2c->lock); in i2c_pxa_probe()
1075 init_waitqueue_head(&i2c->wait); in i2c_pxa_probe()
1082 i2c->adap.nr = dev->id; in i2c_pxa_probe()
1083 snprintf(i2c->adap.name, sizeof(i2c->adap.name), "pxa_i2c-i2c.%u", in i2c_pxa_probe()
1084 i2c->adap.nr); in i2c_pxa_probe()
1086 i2c->clk = clk_get(&dev->dev, NULL); in i2c_pxa_probe()
1087 if (IS_ERR(i2c->clk)) { in i2c_pxa_probe()
1088 ret = PTR_ERR(i2c->clk); in i2c_pxa_probe()
1092 i2c->reg_base = ioremap(res->start, resource_size(res)); in i2c_pxa_probe()
1093 if (!i2c->reg_base) { in i2c_pxa_probe()
1098 i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[i2c_type].ibmr; in i2c_pxa_probe()
1099 i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr; in i2c_pxa_probe()
1100 i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr; in i2c_pxa_probe()
1101 i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr; in i2c_pxa_probe()
1103 i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar; in i2c_pxa_probe()
1105 i2c->iobase = res->start; in i2c_pxa_probe()
1106 i2c->iosize = resource_size(res); in i2c_pxa_probe()
1108 i2c->irq = irq; in i2c_pxa_probe()
1110 i2c->slave_addr = I2C_PXA_SLAVE_ADDR; in i2c_pxa_probe()
1114 i2c->slave_addr = plat->slave_addr; in i2c_pxa_probe()
1115 i2c->slave = plat->slave; in i2c_pxa_probe()
1119 clk_enable(i2c->clk); in i2c_pxa_probe()
1122 i2c->adap.class = plat->class; in i2c_pxa_probe()
1123 i2c->use_pio = plat->use_pio; in i2c_pxa_probe()
1124 i2c->fast_mode = plat->fast_mode; in i2c_pxa_probe()
1127 if (i2c->use_pio) { in i2c_pxa_probe()
1128 i2c->adap.algo = &i2c_pxa_pio_algorithm; in i2c_pxa_probe()
1130 i2c->adap.algo = &i2c_pxa_algorithm; in i2c_pxa_probe()
1132 i2c->adap.name, i2c); in i2c_pxa_probe()
1137 i2c_pxa_reset(i2c); in i2c_pxa_probe()
1139 i2c->adap.algo_data = i2c; in i2c_pxa_probe()
1140 i2c->adap.dev.parent = &dev->dev; in i2c_pxa_probe()
1142 i2c->adap.dev.of_node = dev->dev.of_node; in i2c_pxa_probe()
1145 ret = i2c_add_numbered_adapter(&i2c->adap); in i2c_pxa_probe()
1147 printk(KERN_INFO "I2C: Failed to add bus\n"); in i2c_pxa_probe()
1150 of_i2c_register_devices(&i2c->adap); in i2c_pxa_probe()
1152 platform_set_drvdata(dev, i2c); in i2c_pxa_probe()
1155 printk(KERN_INFO "I2C: %s: PXA I2C adapter, slave address %d\n", in i2c_pxa_probe()
1156 dev_name(&i2c->adap.dev), i2c->slave_addr); in i2c_pxa_probe()
1158 printk(KERN_INFO "I2C: %s: PXA I2C adapter\n", in i2c_pxa_probe()
1159 dev_name(&i2c->adap.dev)); in i2c_pxa_probe()
1164 if (!i2c->use_pio) in i2c_pxa_probe()
1165 free_irq(irq, i2c); in i2c_pxa_probe()
1167 clk_disable(i2c->clk); in i2c_pxa_probe()
1168 iounmap(i2c->reg_base); in i2c_pxa_probe()
1170 clk_put(i2c->clk); in i2c_pxa_probe()
1172 kfree(i2c); in i2c_pxa_probe()
1180 struct pxa_i2c *i2c = platform_get_drvdata(dev); in i2c_pxa_remove() local
1184 i2c_del_adapter(&i2c->adap); in i2c_pxa_remove()
1185 if (!i2c->use_pio) in i2c_pxa_remove()
1186 free_irq(i2c->irq, i2c); in i2c_pxa_remove()
1188 clk_disable(i2c->clk); in i2c_pxa_remove()
1189 clk_put(i2c->clk); in i2c_pxa_remove()
1191 iounmap(i2c->reg_base); in i2c_pxa_remove()
1192 release_mem_region(i2c->iobase, i2c->iosize); in i2c_pxa_remove()
1193 kfree(i2c); in i2c_pxa_remove()
1202 struct pxa_i2c *i2c = platform_get_drvdata(pdev); in i2c_pxa_suspend_noirq() local
1204 clk_disable(i2c->clk); in i2c_pxa_suspend_noirq()
1212 struct pxa_i2c *i2c = platform_get_drvdata(pdev); in i2c_pxa_resume_noirq() local
1214 clk_enable(i2c->clk); in i2c_pxa_resume_noirq()
1215 i2c_pxa_reset(i2c); in i2c_pxa_resume_noirq()
1234 .name = "pxa2xx-i2c",
1252 MODULE_ALIAS("platform:pxa2xx-i2c");